Metal-bending machine.



4 No. 781,355. f PATBNTBD JAN.31`, i905.

' J.jN.PEAvBY.

METAL BENDING MACHINE? APPLIOATION FILED MAB. 18, 1904.

2 SHEETS-SHEET 2.

UNITED STATES Patented January 31, 1905.

T OFFICE.,

v JOHN N. PEAVEY, OF MANCHESTER, NEW HAMPSHIRE.

METAL-BENDING wlnol-HNE.1

'sPEcmIcA'rioN forming part of Letters Patent No. 781,355, dated January31, 1905.

i Application led March 18,1904. Serial No. 198,711. 4

To all whom it may concern:

- Be it known that I, JOHN'N. PEAVEY, Manchester, in the county ofHillsboro and State of New Hampshire, have invented certain new anduseful Improvements in Metal- Bending Machines, of which the followingisa specification.

This lnventlon relates to machines for bending metal, such aswheel-tires and other analegous articles, and has particular referenceto provide` an improved construction of machine-A of this type` in whichthree positively-driven rolls are employed, two of them being adjustablerelatively to the third roll Which will be xed in an intermediateposition between the two adjustable rolls, means being providedv forpositively rotating all three of the rol/ls at a uniform peripheralspeed. l

A further object of the invention is to provide a machine of thischaracter. having means whereby the article to be. bent may beaccurately guided, regardless of the width of said article, whereby anedgewise bend may be given to certain kindsy of tires;

To these ends the invention consists inthe construction and combinationof parts substantially as hereinafter described and claimed.

Of theaccompanying drawings, Figure 1 represents in front elevationamachine embodying my invention.v Fig.`2 is a plan-view' ported uponsaid roller 12 are yokes, each comprising two side plates 13, saidplates being connected by bolts 14, spacing-sleeves be- -ing mounted onthe bolts 14 and abutting at their ends against the inner walls oftheplates 13, so as to rigidly hold said plates in their positionsrelatively to each other. Mounted in each yoke is a roller 16, eachhaving a gear 17 keyed to it. The two gears 17 17 mesh with a gear 18,keyed on one end of the roller 1'2.A Mounted in bearings in the sideplates Each end of the shaft ,19 is squared or otherwise suitably-formedto enableV a crank 21 to be secured thereto, so that by the operationofeither crank 21 or both4 of them the shaft 20 described will causetherotation of the three rolls in a suitable direction to pass or feedthe `bar or tire to be bent between them-that is, While the two rollers16V rotate in the same direction .the roller 12 rotates in a directionopposite thereto, so that the peripheral movement of the underside ofthe roller 12 will be in the same direction as the peripheral movementof the upper sides of the two Swiveled in the lower portions of theyokes 13 are bars 22, having intermediate enlargements, 23,v the latterhaving-threaded apertures i 24, the apertures of the two bars beingthreaded inv opposite directions. Practically the bars 22 with theirthreaded apertures form swiveled nuts.

A right and left handl threaded shaft 25 passes through the two swivelednuts or bars v and extends through slots 26, formed in the end walls ofthe frame 10.. Theinner surfaces of said end walls are formed withways-in which are fitted slides 28, the said slides being mounted uponthe shaft 25, so that the said shaft can rotate therein. Outside of theslotted end plates ofthe frame plates 29 arel mounted upon the shaft 25and secured against endwise movement relativelyto said shaft. Upon oneendy of the shaft 25 is secured a hand-wheel or .crank 30.

It will now be understood that by rotating the shaft 25 in eitherdirection the two yokes are caused to simultaneously swing in oppo- Sitedirections, so as to swing the rollers 16 upward or downward relativelyto the roller 12, according to the direction of rotation imparted to theshaft 25; but since the cross-bars 22, forming the swiveled nuts, mustswing oppositely in arcs of a circle of which the axis of roller 12 isthe center the shaft 25 will move bodily vertically according to theamount of swing imparted to the yokes. The slots 26 in the end plates ofthe frame and the slides of blocks 28 and the plates 29 serve tosmoothly guide the shaft in its said movements. It will also beunderstood that the amount of curvature imparted to the tire, bar, orplate that is being forcibly passed between the rolls by the rotation ofthe crank 21 may be quickly varied, either to change the adjustment forcomplete articles to be bent or for Varying the curvature given to onepart of a bar from that given to another part of the same bar, it beingentirely feasible to adjust the relative positions of the bending-rolls,while said rolls are rotating during a given pass of the article beingbent.

Sometimes it is desirable to bend a bar edgewise-that is, to pass a barbetween the rolls in such position that the edges of the bar instead ofthe sides thereof will be in contact with the peripheries of the rolls.By this is meant, of course, bars which are of greater width thanthickness. When such a bar is passed edgewise between the rolls, itwould be liable to twist during its passage. To prevent this and at thesame to enable uniform bending of such bars, l adjustably secure guidesupon each of the three rolls. In the present embodiment of my inventionthese adjustable guides comprise collars 31, having set-screws 32, bymeans of which the said collars can be adjusted toward or from eachother or toward either end of the rolls. It is also possible to soadjust the three pairs of the guiding-collars that a lateral bend willbe given to the bar as well as the usual bend imparted to a wheeltire.For instance, referring to Fig. 2, it will be readily understood thatifall the collars were set closer together than there shown, the collarsof the rolls 16 being in alinement with each other, but out of alinementwith the collars of the roll 12, the bar during its pass would be givena lateral curvature due tothe arrangement of the guides out of alinementwith each other and also a curvature due to the relative positions ofthe three rolls.

In machines of this character it is sometimes desirable to remove theintermediate or upper roll, even sometimes when the work is in positionbetween the three rolls. In order that this may be quickly andconveniently accomplished, I make the roll 12 of uniform diameter, sothat it can be slipped through its bearings in the frame and also fromthe collars 31 and the portions of the yokes which are mounted thereon.At the end opposite that to which the gear 18 is secured I form aperipheral groove 33. When the parts are assembled, as shown in Fig. 4;,a locking-key 34 is passed through an aperture in a portion of theframe, so as to enter the peripheral groove 33. When it is desired toremove the roll 12, it is only necessary to lift the locking-key 3-1,loosen the set-screws 32 of the two collars, and withdraw the rollendwise in a direction toward the left. (Shown in Fig. 4.)

I claim- 1. A machine of the character described comprising threebending-rolls geared together and relatively adjustable to vary thedegree of curvature that will be imparted by said rolls, and a pair ofcollars mounted upon each of the three rolls for imparting an edgewisebend to a bar and having set-screws whereby they may be secured inadjusted positions lengthwise of the rolls to vary the amount ofedgewise bend given to a bar.

2. A machine of the character described comprising a central roll, yokesmounted upon said roll and each carrying a roll, the three rolls havingintermeshing gears, swiveled nuts carried by the lower portions of saidyokes, a right and left hand threaded .shaft passing through said nuts,and vertical guides for the ends of said shaft.

3. rlhe combination with a frame having guide-slots, of a roll mountedin said frame, yokes mounted upon said roll and each carrying a roll,swiveled nuts carried by the lower portions of the yokes, a right andleft hand threaded shaft passing through said nuts and through the slotsof the frame, and guideplates mounted upon the shaft on opposite sidesof the-slotted portions of the frame.

1. A machine of the character described comprising three rolls directlygeared together, two of said rolls being' mounted to be adjusted aboutthe axis of the third roll without altering their distance therefrom,the said third roll being mounted in fixed position, means forsimultaneously effecting the said adjustment of the two rolls positivelyin either direction, and means for rotating said rolls.

In testimony whereof I have aliixed my signature in presence of twowitnesses.

JOHN N. IJICAVICY.

Witnesses:

WILLIAM B. BLAKE, BERTHA C. FRANCIS.

IOO

